Police 'keeping open mind' over number of plotters in Parsons Green attack

Detectives will continue to work to establish whether more plotters were involved in the Parsons Green terror attack, as a teenager remained in custody over the blast.

Deputy Assistant Commissioner Neil Basu said police were "keeping an open mind" about the perpetrators, following the arrest of an 18-year-old man in the departure area of Dover ferry port on Saturday morning.

The terror threat remains at its highest level - critical - meaning an attack may be imminent.

A separate search is under way at a house in Sunbury-on-Thames, Surrey - home to foster care couple Penelope and Ronald Jones, aged 71 and 88 respectively, who previously received MBEs for services to children and families.

The couple are said to be staying with friends for at least the next five days following the police raids, during which surrounding houses were evacuated by counter-terror officers, with residents told they had "one minute" to flee their homes.

Friend Alison Griffiths said the couple - foster parents for almost 40 years who had taken in up to 300 children, including eight refugees - had an 18-year-old and a 22-year-old staying with them recently.

She described Mr and Mrs Jones as "great pillars of the community", adding: "They do a job that not many people do."